AsyncActionCompletedHandler status

Question

Hi,

I add a  AsyncActionCompletedHandler to be notified when StreamScoket.ConnectAsync operation completes.

MSD documentation for this handler is

public delegate void AsyncActionCompletedHandler(
  IAsyncAction asyncInfo, 
  AsyncStatus asyncStatus
)

IAsyncAction also has an AsyncStatus member Status, is this the same as the AsyncStatus passed to the handler or they reflect different things?

If the operation fails will asyncInfo->ErrorCode.Value contain the SocketErrorStatus?

Answer 1

Hello,

 

AsyncStatus only return the previous async operator status like Canceled, Completed, Error, Started.

 

If your ConnectAsync failed with error. The asyncStatus return 3, and it is not the SocketErrorStatus.

 

The SocketErrorStatus error you should use SocketError.GetStatus  to get is this is static function.

http://msdn.microsoft.com/en-us/library/windows/apps/windows.networking.sockets.socketerror.getstatus.aspx

 

Best regards,

Jesse

---

Jesse Jiang [MSFT]
MSDN Community Support | Feedback to us

Answer 2

To be sure i understand it correctly, could i do something like this

AsyncOperationWithProgressCompletedHandler<IBuffer^, uint32> readInfo = ...;

readInfo->Completed = ref new AsyncOperationWithProgressCompletedHandler<IBuffer^, uint32>
    ([=](IAsyncOperationWithProgress<IBuffer^,uint32>^ info, AsyncStatus status)
            {
                if(info->Status == AsyncStatus::Error)
                {
                    int errorCode = SocketError::GetStatus();
                    // handle socket error.
                }
                else if(info->Status == AsyncStatus::Canceled)
                {
                    // operation was canceled.
                }
                else
                {
                    // operation success
                    IBuffer^ b = info->GetResults();
                }
            });

Answer 3

Hello,

You should use asyncStatus==AsyncStatus::Error to get the error result.

if(asyncStatus==AsyncStatus::Error)
            {
                try
                {
                    int res= info->GetResults();

                }catch(Exception^ ex)
                {
                 
                }
            }

You can also use try-catch block in the task.

Best regards,
Jesse

---

Jesse Jiang [MSFT]
MSDN Community Support | Feedback to us